SS Block Index Signaling Across Sync Signals and PBCH
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Solution Overview
Problem
In next-generation wireless communication systems like 5G, the increased amount of information required for system identification during initial access can lead to a payload size shortage in the PBCH and increased workload for user equipment apparatuses due to the need to identify SS block indices using PSS and SSS simultaneously.
Innovation Solution
The SS block index is partially transmitted using PSS, SSS, and a newly defined TSS, with the remaining portion transmitted via PBCH, optimizing the workload and payload size by limiting the detection range for user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the SS block index is transmitted using only PBCH, then the payload size of PBCH becomes insufficient, but if transmitted using only PSS and SSS, then the user equipment workload increases
Solution Approach 1:
The SS block index is divided into two parts: the most significant bits are transmitted via PSS/SSS/TSS, and the less significant bits are transmitted via PBCH. This segmentation allows the information to be distributed across multiple channels, avoiding payload overflow in PBCH while reducing the detection complexity for user equipment, as they can acquire the most significant bits earlier through synchronization signals.
2Loss of information
If the amount of information for system identification is increased, then more comprehensive system information is provided, but the payload size of PBCH becomes insufficient
Solution Approach 1:
The transmission of system identification information is extended from a single channel (PBCH) to multiple dimensions including time-domain synchronization signals (PSS/SSS) and the physical broadcast channel. By utilizing the synchronization signal dimension, the system can transmit additional information bits without overloading the PBCH payload, effectively expanding the information capacity across different transmission dimensions.
Data Source
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Figure 3A
AI summary
In one aspect of the present invention, a base station includes an index generation unit configured to generate an index indicating a time-domain location of a synchronization signal block where a synchronization signal or a physical broadcast channel is placed; and a transmission unit configured to transmit a portion of the index using one or more synchronization signal of a primary synchronization signal, a secondary synchronization signal, and a tertiary synchronization signal and transmit a remaining portion of the index using the physical broadcast channel.